The pulse of every storm,
in thirty-minute motion

Animated precipitation radar centered on Pennsylvania, stitched together from the RainViewer tile mosaic. Two hours of past frames plus a thirty-minute nowcast. Drag to pan, scroll to zoom.

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Opacity Speed Clouds (infrared) Vivid palette

Reading the radar

How the sweep works

Past two hours

Frames step backward in ten-minute intervals — the animation begins two hours ago and runs up to the current moment.

Thirty-minute nowcast

RainViewer projects the next thirty minutes of precipitation using radar motion vectors. Useful for short-term storm avoidance, less so for accumulation totals.

Color ramp

Light greens and blues are drizzle and light rain. Yellows and oranges indicate moderate to heavy rain. Reds and purples mean intense rainfall, hail, or very heavy snow equivalents.

Refresh cadence

New frames appear every ten minutes. This page reloads the frame manifest quietly in the background every five minutes so you always have the freshest loop.

Awaiting first frame…

Related desks

The pulse of every storm,
in thirty-minute motion

How the sweep works

Past two hours

Thirty-minute nowcast

Color ramp

Refresh cadence

Pair radar with the full picture

Satellite

Lightning Tracker

Active Alerts

Fronts & Pressure

The pulse of every storm,in thirty-minute motion

Past two hours

Thirty-minute nowcast

Color ramp

Refresh cadence

Satellite

Lightning Tracker

Active Alerts

Fronts & Pressure

The pulse of every storm,
in thirty-minute motion